Bent intake valves on one cylinder

[dskagr]

What could be the cause of bent intake valves on only one cylinder (cyl 4) ? No marks on piston head, just the slightest slightest bend on the valves, just enough to make taking those valves a little harder than the rest. Never revved past 7300 and am on supertech dual springs so I'm thinking it shouldn't have floated.

It didn't give me any problems, honestly I don't think I would have noticed if the head didn't come off.
I just happened to be taking apart the head to clean it up, put 3g lifters, and do the oil mod.

Thanks.

 

[cdubb79]

The only thing I can think of is that they were already bent or the timing may be slightly off. A slight bend could equal no marks on the pistons.

 

[miliman13]

Improperly installed valves, OR ! A bad wrist pin will create sufficient play to extend the stroke of the piston to contact the valves.
timing could also play a factor.-"check Mech timing" -There could be many reasons but i think logically there's a higher chance of the issue originating from the head rather than the block.

When i bent the crap out of my intake valves there were no marks on my pistons..

 

[My1GLaser]

Was the head ever off and sitting on the deck surface with the cams still installed? I accidentally bent 2 intake valves on one cylinder like that a few years ago. Two were partially open and I must have set it down on the bench too hard...